imco_single: Single Inter-modal Coupling model
In neuroconductor/mimosa: 'MIMoSA': A Method for Inter-Modal Segmentation Analysis

Data for coupling estimation on a single subject and single voxel

imco_single(
  files,
  vxl,
  brainMask,
  subMask = NULL,
  ref = 1,
  neighborhoodSize = 3
)

`files`	Vector of full paths to images or a list of local nifti objects
`vxl`	Vector of single voxel indices to get data from
`brainMask`	Full path to brain mask or local nifti object
`subMask`	NULL or local nifti object or the full path to a mask that is a subset of brain mask where coupling should be computed
`ref`	reference modality when type="pca" or dependent modality when type="regression"
`neighborhoodSize`	Full width in voxels for FWHM